Hoist.



UNITED sTATEs PATENT oEEroE.

ROBERT H. BEEBE AND JOSEPH TRIMBLE, OF ST. JOHNS, OREGON, ASSIGNORS TO THE HYDRAULIC WOOD LIFT COMPANY, OF ST. JOHNS, OREGON, A CORPORATION OF OREGON.

I-IOIST.

Specification of Letters Patent.

Patented Aug. 13, 1907'.

Application filed March 29,1907. Serial No. 365,224.

To all whom it may concern:

Be it known that we, ROBERT H. BEEBE and JosErH TRIMBLE, both citizens of the United States, and residents of St. Johns, in the county of Multnomah and State of Oregon, have invented a new and Improved Hoist, of which the following is a full, clear, and exact description.

The invention relates to a hoist useful for various purposes but particularly useful in dumb waiter shafts for hoisting household supplies and the like.

The object of the invention is to provide a powerful hoist which may be easily operated and conveniently controlled, and to this end we provide a drum with peculiar driving mechanism and with a brake device coacting with the driving mechanism, by means of which brake the rotation of the drum may be retarded to any desired degree.

Reference is to be had to the accompanying drawings which illustrate as an example the preferred embodiment of our invention, in which drawings Figure 1 isa side view of the invention with parts broken away; Fig. 2 is a front view of the invention; and Fig. 3 is a section along the axis of the drum.

The apparatus is provided with a frame comprising a back plate or body l0 having outwardly projecting brackets 11 and 12. On these brackets is loosely mounted a shaft 14 which carries loosely a winding drum 15. This drum is located between the brackets 11 and 12, and is adapted to carry the hoisting rope 16,

as shown. Keyed to one end of the shaft I4 is a handle 17, by means of which the hoist is operated. The opposite end portion of the shaft carries directly adjacent to the drum 15 and inside of the bracket 12 a toothed pinion 18 which meshes, as shown in Fig. 1,

i5 with a pinion 19 mounted on a stud shaft 20 carried by the bracket 12, and this pinion 19 is in mesh with an 'internal gear 21 formed on the adjacent iange of the drum 15. Consequently, by rotating the shaft 14 through the handle 17 a relatively slow rotary movel0 ment is imparted to the drum 15 with a corresponding gain of power. :The end portion of the shaft 14 carrying the pinion 1S projects beyond the bracket 12, and has a flange 22 thereon.Overthisgprojectingend portion of the shaft is wound a brake cord 23. One end of this cord is fastened to a projecting stud 24 carried by the frame of the hoist, and the other end of the cord carries a brake weight 25 which hangs from the shaft in a convenient position to be lifted at will by the operator.

In the operation of the device when it is desired to hoist a load, the weight 25 is lifted so that the cord 23 does not exert a tension on the shaft 14. The handle 17 is then operated, and the drum 15 is rotated. When it is desired to retard the rotation of the drum the weight 25 is dropped, allowing the cord 23 to exert its tension 55 on the shaft. This operation of the weight and brake cord is particularly useful in lowering a receptacle held by the hoisting rope 1G, the tension of the brake cord being regulated at will so that it will not be necessary to operate the handle 17 in descent of the hoisting re- 60 ceptacle, said receptacle dropping slowly by its own weight and the rope 16 unwinding from the drum.

It will be seen that the apparatus enables considerable power to be applied in the hoisting operation, and allows the hoisting rope to be unwound rapidly or at any desired rate of speed.

Having thus described the preferred form of our invention, what we claim as new and desire to secure by Letters Patent is:

In a'device of the class described, a frame, comprising a 70 body, having outwardly projecting brackets, a shaft loosely mounted in the brackets, a drum on the shaft adapted t0 carry a hoisting rope, said drum having a flange provided with internal gear teeth, alpinion on the shaft, a pinion on the bracket, meshing with the pinion on the shaft and 7 5 with the internal gear teeth of the flange, said shaft being extended at one end and provided with a ange, a brake cord wound on said extension, said frame being provided with a projection to which one end of the brake cord is secured, a weight on the other end of the cord, and a crank on the opposite end of the shaft from the extension for rotating,r said shaft.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ROBERT H. BEEBE. JOSEPH TRIMBLE. Witnesses for Robert H. Beebe:

A. L. WATSON, A. H. INNrs. Witnesses for Joseph Trimble:

CLARA SCHUEFERT, SARAH COYNE. 

